Privacy Policy

Last updated: August 2026

This Privacy Policy explains how Half Birthday Calculator ("we," "our," or "this site") handles information when you use our website and calculators.

Dates You Enter Into Our Calculators

Every calculator on this site, including the half birthday calculator, age calculator, birthday countdown, date difference calculator, and day of birth calculator, runs entirely in your web browser using JavaScript. Any date you enter is processed locally on your device and is never transmitted to, or stored on, our servers. When you close or refresh the page, the information is gone.

Contact Form Information

If you use our contact page to send us a message, any information you provide (such as your name, email address, and message) is only used to respond to your inquiry. We do not sell or share this information with third parties for marketing purposes.

Cookies

This website does not use cookies to track individual visitors for advertising purposes. If analytics are enabled by the site owner (see below), the analytics provider may set its own cookies in accordance with its own privacy policy.

Analytics

The site owner may optionally enable a standard web analytics service (such as Google Analytics) to understand aggregate, anonymized traffic patterns like page views and general geographic region. This data does not include any dates entered into our calculators, since those calculations never leave your browser. If analytics is not configured, no such data is collected at all.

Third-Party Services

This website does not integrate with third-party services beyond optional analytics as described above. We do not use your calculator inputs for advertising, profiling, or any other purpose.

Data Retention

Because calculator inputs are never transmitted to our servers, there is no server-side data to retain or delete. Contact form submissions, if and when the form is connected to an email service, are retained only as long as necessary to respond to your inquiry.

Children's Privacy

Our calculators may be used by parents to calculate information about their children, such as a child's half birthday. We do not knowingly collect personal information directly from children, and as explained above, no calculator inputs are transmitted to or stored on our servers.

Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated "last updated" date.

Contact Us

If you have questions about this Privacy Policy, please visit our contact page.